function addURLResource() {
  var durl = window.content.document.location.href.toString();
  var dtitle = window.content.document.title

  const MY_ID = "nepotask@adrien.guichard";
  var path = Components.classes["@mozilla.org/extensions/manager;1"].
             getService(Components.interfaces.nsIExtensionManager).
             getInstallLocation(MY_ID).getItemFile(MY_ID, "chrome/content/taskaddurl.py").
             path;

  var exec = Components.classes["@mozilla.org/file/local;1"].
             createInstance(Components.interfaces.nsILocalFile);

   exec.initWithPath(path);

    if (exec.exists()) {
      var process = Components.classes["@mozilla.org/process/util;1"].
                    createInstance(Components.interfaces.nsIProcess);
      var args = [durl, dtitle];

      process.init(exec);
      process.run(true, args, args.length);
    } else {
       alert("Cannot find taskaddurl.py");
    }
}
  